Unlock the Secret of Molarity

Have you ever wondered how to calculate the molarity of a solution?

Let's dive into a chemical mystery and solve the puzzle of concentration together!

Unraveling the Mystery of Molarity

Are you ready to unlock the secret of molarity? Let's embark on a journey to discover the concentration of S2O32- in a solution prepared using Na2S2O3 and KCl.

Calculating the molarity of a solution involves understanding the relationship between moles, volume, and concentration. In this scenario, we are tasked with determining the concentration of S2O32- in a solution created by combining 150 mL of 0.149 M Na2S2O3 with enough KCl to make a 250.0 mL solution. The key to solving this mystery lies in breaking down the steps involved in finding the molarity of S2O32-.

1. Calculate the number of moles of S2O32- in the Na2S2O3 solution:

Moles = concentration x volume = 0.149 M x 0.150 L = 0.02235 moles

2. Determine the molarity of S2O32- in the final solution:

Concentration = moles / volume = 0.02235 moles / 0.250 L = 0.0894 M

By following these steps, we can unravel the mystery and calculate the molarity of S2O32- in the solution accurately. Understanding the concept of molarity allows us to grasp the concentration of substances in solutions, opening up a world of possibilities in chemistry.